Ceiling fan structure with detachable dc controller

ABSTRACT

A ceiling fan structure with detachable DC controller includes a canopy having a mounting bracket assembled therein, a filter device assembled in the canopy, a downrod fixed to the mounting bracket at a top end thereof, a bottom end of the downrod passing through the canopy and vertically downward extending, a motor assembled to the bottom end of the downrod, the motor having a shaft, a suspending case enclosing the motor, a DC controller assembled on the suspending case and having a switching circuit and signal wires, each signal wire passing though the suspending case and electrically connected to the motor, the filter device having power wires, each power wire passing through the downrod and electrically connected to the switching circuit of the DC controller, blades fixed around the shaft and the blades rotated by the rotation of the shaft.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a fan structure, and more particularlyto a ceiling fan structure with detachable DC controller.

2. Description of the Prior Art

Referring to FIGS. 2-3, a first conventional ceiling fan structurecomprises a canopy 91, a power module 96, a downrod 93, a motor 94, asuspending case 95 and a plurality of blades. The canopy 91 has amounting bracket 92 assembled therein. The mounting bracket 92 isconfigured to fix the canopy 91 to a ceiling (as shown in FIG. 3). Thedownrod 93 is fixed to the mounting bracket 92 at a top end thereof. Abottom end of the downrod 93 passes through the canopy 91 and verticallydownward extends. The motor 94 is assembled to the bottom end of thedownrod 93. The motor 94 has a shaft. The shaft is configured to bedriven to rotate. The blades are fixed around the shaft. The blades arerotated by the rotation of the shaft. The suspending case 95 enclosesthe motor 94. The power module 96 is assembled in the suspending case 95as the motor 94 and is directly connected to the motor 94. The powermodule 96 has a power supply 961 and a DC controller 962 which isadjacent to each other. However, because the DC controller 962 isassembled in the suspending case, when the user wants to replace the DCcontroller 962, the user must remove the suspending case 95 as a whole,so as to expose the DC controller 962. Therefore, the arrangement of thefirst conventional ceiling fan structure has the replacementinconvenient.

There is a second conventional ceiling fan structure as shown in FIG. 3.Only the difference between the second conventional ceiling fanstructure and the first conventional ceiling fan structure is describedherein. The power module 96 is assembled in the canopy 91. A pluralityof wires 97 from the power supply 961 and the DC controller 962 passesthrough the downrod 93 and is electrically connected to the motor 94.When the user wants to replace the DC controller 962, the user justremoves the canopy 91. On this way, it is more convenient than thereplacement for the first conventional ceiling fan structure. However,because the power module 96 as a whole is assembled in the canopy 91,the wires 97 all pass though the downrod 93. Therefore, the innerdiameter of the downrod 93 must fit the wires 97 form the power supply961 and the DC controller 962; in other words, the downrod 93 would bestout. Furthermore, the arrangement in the downrod 93 would becomplicated.

The present invention is, therefore, arisen to obviate or at leastmitigate the above mentioned disadvantages.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a ceiling fan structurewith detachable DC controller, wherein the user can replace the DCcontroller conveniently and the arrangement in a downrod of the fanstructure could be simplified.

To achieve the above and other objects, a ceiling fan structurecomprises a canopy having a mounting bracket assembled therein, themounting bracket configured to fix the canopy to a ceiling, a filterdevice assembled in the canopy, a downrod fixed to the mounting bracketat a top end thereof, a bottom end of the downrod passing through thecanopy and vertically downward extending, a motor assembled to thebottom end of the downrod, the motor having a shaft configured to bedriven to rotate, a suspending case enclosing the motor, a DC controllerassembled on the suspending case and having a switching circuit and aplurality of signal wires, each signal wire passing though thesuspending case and electrically connected to the motor, the filterdevice having a plurality of power wires, each power wire passingthrough the downrod and electrically connected to the switching circuitof the DC controller a plurality of blades fixed around the shaft andthe blades rotated by the rotation of the shaft. Wherein, the suspendingcase has a lid detachably assembled thereon, the lid covering the DCcontroller.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawings,which show, for purpose of illustrations only, the preferredembodiment(s) in accordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of one embodiment of the presentinvention;

FIG. 2 is a cross-sectional view of one conventional ceiling fanstructure in which a DC controller is assembled in a suspending case;and

FIG. 3 is a cross-sectional view of another conventional ceiling fanstructure in which a DC controller is assembled in a canopy.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to FIG. 1, one embodiment in accordance with the presentinvention is described as follows. A ceiling fan structure comprises acanopy 1, a filter device 2, a downrod 3, a motor 4, a suspending case5, a DC controller 6 and a plurality of blades 7.

Referring to FIG. 1, the canopy 1 has a mounting bracket 11 assembledtherein. The mounting bracket 11 is configured to fix the canopy 1 to aceiling. The filter device 2 is assembled in the canopy 1. The filterdevice 2 can also be illustrated as an electric filter which filtersnoise of alternating current so as to have the current wavy curve smoothand prevent the current wavy curve form being bumpy.

Referring to FIG. 1, the downrod 3 is fixed to the mounting bracket 11at a top end thereof. A bottom end of the downrod 3 passes through thecanopy 1 and vertically downward extends. The motor 4 is assembled tothe bottom end of the downrod 3. The motor 4 has a shaft 41. The shaft41 is configured to be driven to rotate. The blades 7 are fixed aroundthe shaft 41. The blades 7 are rotated by the rotation of the shaft 41.The suspending case 5 encloses the motor 4.

Referring to FIG. 1, the DC controller 6 is assembled on the suspendingcase 5. The DC controller 6 has a switching circuit 61 and a pluralityof signal wires 62. Each signal wire 62 passes though the suspendingcase 5 and is electrically connected to the motor 4. The filter device 2has a plurality of power wires 21. Each power wire 21 passes through thedownrod 3 and is electrically connected to the switching circuit 61 ofthe DC controller 6. The suspending case 5 has a lid 51 detachablyassembled thereon. The lid 51 covers the DC controller 6.

All in all, the embodiment of the present invention has severaladvantages as follows:

First, because the DC controller 6 is assembled on the suspending case5, when the user wants to replace the DC controller 6, the user justremoves the lid 51 so as to expose the DC controller 6. Therefore, theembodiment of the present invention has the replacement easier than theprior art.

Second, in another embodiment, the lid 51 might be unnecessary so as tohave the DC controller 6 exposed. However, the lid 51 could not onlyprotect the DC controller 6 from exposure, but also have the wholeceiling fan structure artistic.

Third, because the DC controller 6 is assembled on the suspending case 5and is very close to the motor 4, the operation to replace the signalwires 62 between the DC controller 6 and the motor 4 is easier than theprior art. In addition, because the DC controller 6 is not assembled inthe canopy 1 as the filter device 2, the signal wires 62 don't passthough the downrod 3 as the power wires 21. On this way, the innerdiameter of the downrod 3 just has to fit the power wires 21; in otherwords, the downrod 3 could be slimmer than the prior art. Furthermore,the arrangement in the downrod 3 could be simplified.

Although particular embodiments of the invention have been described indetail for purposes of illustration, various modifications andenhancements may be made without departing from the spirit and scope ofthe invention. Accordingly, the invention is not to be limited except asby the appended claims.

What is claimed is:
 1. A ceiling fan structure with detachable DCcontroller comprising: a canopy having a mounting bracket assembledtherein, the mounting bracket configured to fix the canopy to a ceiling;a filter device assembled in the canopy; a downrod fixed to the mountingbracket at a top end thereof, a bottom end of the downrod passingthrough the canopy and vertically downward extending; a motor assembledto the bottom end of the downrod, the motor having a shaft configured tobe driven to rotate; a suspending case enclosing the motor; a DCcontroller assembled on the suspending case and having a switchingcircuit and a plurality of signal wires, each signal wire passing thoughthe suspending case and electrically connected to the motor, the filterdevice having a plurality of power wires, each power wire passingthrough the downrod and electrically connected to the switching circuitof the DC controller; and a plurality of blades fixed around the shaft,the blades rotated by the rotation of the shaft.
 2. The ceiling fanstructure with detachable DC controller as claimed in claim 1, whereinthe suspending case has a lid detachably assembled thereon, the lidcovering the DC controller.